[Tweeters] A big Big Sat

[Larry Schwitters via Tweeters]

Tweeters,

Every Saturday of both Vaux’s Swift migrations Vaux’s Happening makes a big deal about documenting how many swifts are where on that date. In the last 17 years we've been finding more swifts at fewer roosts. The last two years there have been three Saturdays where we documented over 90,000 of the wee birds. Yesterday was our most productive Saturday ever, 120,238.

Our North San Francisco Bay roost had 2/3 of them.

The swifts showed up the first week of September at the monster roost site we're watching in Mexico

Larry Schwitters
Issaquah